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How to use allocAddr method of prog Package

Best Syzkaller code snippet using prog.allocAddr

mutation.go

Source:mutation.go

...121	arg.data = mutateData(r, arg.Data(), 0, maxBlobLen)122	// Update base pointer if size has increased.123	if baseSize < base.Res.Size() {124		s := analyze(ctx.ct, p, p.Calls[0])125		newArg := r.allocAddr(s, base.Type(), base.Res.Size(), base.Res)126		*base = *newArg127	}128	return true129}130func (ctx *mutator) insertCall() bool {131	p, r := ctx.p, ctx.r132	if len(p.Calls) >= ctx.ncalls {133		return false134	}135	idx := r.biasedRand(len(p.Calls)+1, 5)136	var c *Call137	if idx < len(p.Calls) {138		c = p.Calls[idx]139	}140	s := analyze(ctx.ct, p, c)141	calls := r.generateCall(s, p)142	p.insertBefore(c, calls)143	return true144}145func (ctx *mutator) removeCall() bool {146	p, r := ctx.p, ctx.r147	if len(p.Calls) == 0 {148		return false149	}150	idx := r.Intn(len(p.Calls))151	p.RemoveCall(idx)152	return true153}154func (ctx *mutator) mutateArg() bool {155	p, r := ctx.p, ctx.r156	if len(p.Calls) == 0 {157		return false158	}159	c := p.Calls[r.Intn(len(p.Calls))]160	if len(c.Args) == 0 {161		return false162	}163	s := analyze(ctx.ct, p, c)164	updateSizes := true165	for stop, ok := false, false; !stop; stop = ok && r.oneOf(3) {166		ok = true167		ma := &mutationArgs{target: p.Target}168		ForeachArg(c, ma.collectArg)169		if len(ma.args) == 0 {170			return false171		}172		idx := r.Intn(len(ma.args))173		arg, ctx := ma.args[idx], ma.ctxes[idx]174		calls, ok1 := p.Target.mutateArg(r, s, arg, ctx, &updateSizes)175		if !ok1 {176			ok = false177			continue178		}179		p.insertBefore(c, calls)180		if updateSizes {181			p.Target.assignSizesCall(c)182		}183		p.Target.SanitizeCall(c)184	}185	return true186}187func (target *Target) mutateArgForDependencyResource(r *randGen, s *state, arg Arg, ctx ArgCtx, updateSizes *bool) ([]*Call, bool) {188	var baseSize uint64189	if ctx.Base != nil {190		baseSize = ctx.Base.Res.Size()191	}192	calls, retry, preserve := arg.Type().mutate(r, s, arg, ctx)193	if retry {194		return nil, false195	}196	if preserve {197		*updateSizes = false198	}199	// Update base pointer if size has increased.200	if base := ctx.Base; base != nil && baseSize < base.Res.Size() {201		newArg := r.allocAddr(s, base.Type(), base.Res.Size(), base.Res)202		replaceArg(base, newArg)203	}204	for _, c := range calls {205		target.SanitizeCall(c)206	}207	return calls, true208}209func (target *Target) mutateArg(r *randGen, s *state, arg Arg, ctx ArgCtx, updateSizes *bool) ([]*Call, bool) {210	var baseSize uint64211	if ctx.Base != nil {212		baseSize = ctx.Base.Res.Size()213	}214	calls, retry, preserve := arg.Type().mutate(r, s, arg, ctx)215	if retry {216		return nil, false217	}218	if preserve {219		*updateSizes = false220	}221	// Update base pointer if size has increased.222	if base := ctx.Base; base != nil && baseSize < base.Res.Size() {223		newArg := r.allocAddr(s, base.Type(), base.Res.Size(), base.Res)224		replaceArg(base, newArg)225	}226	for _, c := range calls {227		target.SanitizeCall(c)228	}229	return calls, true230}231func regenerate(r *randGen, s *state, arg Arg) (calls []*Call, retry, preserve bool) {232	var newArg Arg233	newArg, calls = r.generateArg(s, arg.Type())234	replaceArg(arg, newArg)235	return236}237func mutateInt(r *randGen, s *state, arg Arg) (calls []*Call, retry, preserve bool) {238	if r.bin() {239		return regenerate(r, s, arg)240	}241	a := arg.(*ConstArg)242	switch {243	case r.nOutOf(1, 3):244		a.Val += uint64(r.Intn(4)) + 1245	case r.nOutOf(1, 2):246		a.Val -= uint64(r.Intn(4)) + 1247	default:248		a.Val ^= 1 << uint64(r.Intn(64))249	}250	return251}252func (t *IntType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {253	return mutateInt(r, s, arg)254}255func (t *FlagsType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {256	return mutateInt(r, s, arg)257}258func (t *LenType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {259	if !r.mutateSize(arg.(*ConstArg), *ctx.Parent) {260		retry = true261		return262	}263	preserve = true264	return265}266func (t *ResourceType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {267	return regenerate(r, s, arg)268}269func (t *VmaType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {270	return regenerate(r, s, arg)271}272func (t *ProcType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {273	return regenerate(r, s, arg)274}275func (t *BufferType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {276	a := arg.(*DataArg)277	switch t.Kind {278	case BufferBlobRand, BufferBlobRange:279		data := append([]byte{}, a.Data()...)280		minLen, maxLen := uint64(0), maxBlobLen281		if t.Kind == BufferBlobRange {282			minLen, maxLen = t.RangeBegin, t.RangeEnd283		}284		a.data = mutateData(r, data, minLen, maxLen)285	case BufferString:286		data := append([]byte{}, a.Data()...)287		if r.bin() {288			minLen, maxLen := uint64(0), maxBlobLen289			if t.TypeSize != 0 {290				minLen, maxLen = t.TypeSize, t.TypeSize291			}292			a.data = mutateData(r, data, minLen, maxLen)293		} else {294			a.data = r.randString(s, t)295		}296	case BufferFilename:297		a.data = []byte(r.filename(s, t))298	case BufferText:299		data := append([]byte{}, a.Data()...)300		a.data = r.mutateText(t.Text, data)301	default:302		panic("unknown buffer kind")303	}304	return305}306func (t *ArrayType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {307	// TODO: swap elements of the array308	a := arg.(*GroupArg)309	count := uint64(0)310	switch t.Kind {311	case ArrayRandLen:312		for count == uint64(len(a.Inner)) {313			count = r.randArrayLen()314		}315	case ArrayRangeLen:316		if t.RangeBegin == t.RangeEnd {317			panic("trying to mutate fixed length array")318		}319		for count == uint64(len(a.Inner)) {320			count = r.randRange(t.RangeBegin, t.RangeEnd)321		}322	}323	if count > uint64(len(a.Inner)) {324		for count > uint64(len(a.Inner)) {325			newArg, newCalls := r.generateArg(s, t.Type)326			a.Inner = append(a.Inner, newArg)327			calls = append(calls, newCalls...)328			for _, c := range newCalls {329				s.analyze(c)330			}331		}332	} else if count < uint64(len(a.Inner)) {333		for _, arg := range a.Inner[count:] {334			removeArg(arg)335		}336		a.Inner = a.Inner[:count]337	}338	return339}340func (t *PtrType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {341	a := arg.(*PointerArg)342	if r.oneOf(1000) {343		removeArg(a.Res)344		index := r.rand(len(r.target.SpecialPointers))345		newArg := MakeSpecialPointerArg(t, index)346		replaceArg(arg, newArg)347		return348	}349	newArg := r.allocAddr(s, t, a.Res.Size(), a.Res)350	replaceArg(arg, newArg)351	return352}353func (t *StructType) mutate(r *randGen, s *state, arg Arg, ctx ArgCtx) (calls []*Call, retry, preserve bool) {354	gen := r.target.SpecialTypes[t.Name()]355	if gen == nil {356		panic("bad arg returned by mutationArgs: StructType")357	}358	var newArg Arg359	newArg, calls = gen(&Gen{r, s}, t, arg)360	a := arg.(*GroupArg)361	for i, f := range newArg.(*GroupArg).Inner {362		replaceArg(a.Inner[i], f)363	}...

allocAddr

Using AI Code Generation

1import (2type prog struct {3}4func (p *prog) allocAddr() uintptr {5    return uintptr(unsafe.Pointer(p))6}7func main() {8    p := &prog{"Go", 1.12}9    fmt.Println("Address of p is", p.allocAddr())10}

allocAddr

Using AI Code Generation

1import (2type prog struct {3}4func (p *prog) allocAddr() unsafe.Pointer {5	return unsafe.Pointer(p)6}7func main() {8	p := &prog{lang: "Go"}9	fmt.Println(p.allocAddr())10}

allocAddr

Using AI Code Generation

1import (2func main() {3    size, _ := strconv.Atoi(os.Args[1])4    addr, _ := strconv.Atoi(os.Args[2])5    prog.allocAddr(size, addr)6}7import (8func main() {9    size, _ := strconv.Atoi(os.Args[1])10    addr, _ := strconv.Atoi(os.Args[2])11    prog.allocAddr(size, addr)12}13import (14func main() {15    size, _ := strconv.Atoi(os.Args[1])16    addr, _ := strconv.Atoi(os.Args[2])17    prog.allocAddr(size, addr)18}19import (20func main() {21    size, _ := strconv.Atoi(os.Args[1])22    addr, _ := strconv.Atoi(os.Args[2])23    prog.allocAddr(size, addr)24}25import (26func main() {27    size, _ := strconv.Atoi(os.Args[1])28    addr, _ := strconv.Atoi(os.Args[2])

allocAddr

Using AI Code Generation

1import (2type prog struct {3}4func main() {5 fmt.Println("Hello, playground")6 fmt.Println(p)

allocAddr

Using AI Code Generation

1import "fmt"2func main() {3  p.allocAddr()4  fmt.Println(p.addr)5}6&{1 2 3 4}7import "fmt"8func main() {9  p.allocAddr()10  fmt.Println(*p.addr)11}

allocAddr

Using AI Code Generation

1import "fmt"2func main() {3p = prog.allocAddr()4fmt.Println(*p)5}6type prog struct {7}8func (*prog) allocAddr() *int {9}10cannot use prog.allocAddr() (type *int) as type *int in assignment

allocAddr

Using AI Code Generation

1import "fmt"2func main() {3   p := new(prog)4   p.allocAddr(100)5   p.freeAddr()6}7import "unsafe"8type prog struct {9}10func (p *prog) allocAddr(size int) {11   p.addr = uintptr(unsafe.Pointer(new([100]int)))12}13func (p *prog) freeAddr() {14}15import "fmt"16func main() {17   p := new(prog)18   p.AllocAddr(100)19   p.FreeAddr()20}21import "unsafe"22type prog struct {23}24func (p *prog) AllocAddr(size int) {25   p.addr = uintptr(unsafe.Pointer(new([100]int)))26}27func (p *prog) FreeAddr() {28}29import "fmt"30func main() {31   p := new(prog)32   p.AllocAddr(100)33   p.FreeAddr()34}

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